Sign Language — Imprint

These simple silk-screened signs from the late 1930s or early 1940s say a lot about the English language and American mores of the times. In just a few words one can guess what kind of establishment (cafe/bar) it was and even speculate as to the clientele. And questions are asked to: Why are ladies not allowed to sit at the bar? Why is dancing prohibited? What strata of establishment would hang such well branded signs? Why blue?